flexible pipe under subfloor

I have a 1/2" flexible copper pipe (type L) coming out of a chunk of concrete and the top of that pipe is about 1/16" above where a plywood subfloor will be laid and meet the concrete.

Is it OK if the floor rests on the pipe? Or will it cause problems to have half of the pipe embedded in concrete and the other half weighted down by concrete/backerboard/tile because of the difference in expansion between wood and concrete?

The copper should NOT be "weighted down" by ANYTHING. There should be a space between it and the wood, AND the concrete. The different expansion rates may cause problems but it will not be with the copper tubing.

jimbo: really? Gheez. The people who did this bathroom back in the 1950s buried copper pipes, both supply and drain, in 4" of concrete! Not only that they buried a ton of knob and tube wiring in it as well.

jimbo: really? Gheez. The people who did this bathroom back in the 1950s buried copper pipes, both supply and drain, in 4" of concrete! Not only that they buried a ton of knob and tube wiring in it as well.

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If that is not a joke about the knob and tube you have a major safety problem if that is still active!!

There are frequent posts regarding leaks in slabs where copper water lines have been buried in concrete. The problem is concrete attacks the copper. It is stupid to encase copper in concrete, but it has been common practice in slab built homes for years.

I cannot imagine ANY sane person direct burying ANY wiring under a concrete slab. Concrete does not "abrade" tubing passing through it because it is held rigidly and cannot move. Expansion/contraction WILL abrade tubing which has a rock pressed against it under the concrete, however. Trying to bend a short section of copper tubing will almost ALWAYS kink it.